/*
 * The MIT License
 * Copyright (c) 2009 Thinkpot.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package thinkpot.web;

import java.io.File;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;

/**
 * @author S.Ito
 */
public class SessionManagedFileContainer implements Serializable,
	HttpSessionBindingListener {

	/** シリアル・バージョンUID */
	private static final long serialVersionUID = -4337673134992099772L;

	private final Map innerMap = new HashMap();

	public File getFile(String key) {

		return (File) innerMap.get(key);
	}

	public void putFile(String key, File value) {

		removeFile(key);
		innerMap.put(key, value);
	}

	public void removeFile(String key) {

		final File file = getFile(key);

		if (null != file && file.exists()) {
			file.delete();
		}

		innerMap.remove(key);
	}

	public void removeAllFiles() {

		for (Iterator i = innerMap.values().iterator(); i.hasNext();) {
			final File file = (File) i.next();

			if (null != file && file.exists()) {
				file.delete();
			}
		}

		innerMap.clear();
	}

	public int getFileCount() {

		return innerMap.size();
	}

	public void valueBound(HttpSessionBindingEvent event) {

		//何もしない
	}

	public void valueUnbound(HttpSessionBindingEvent event) {

		removeAllFiles();
	}
}
